make new clients each time get_tiled_client() is called

 * the underlying object is not async-compatible so make a new client
   every time one is requested instead of sharing

Author: JunAishima

utils.py

@@ -5,9 +5,8 @@
 
 LOCATION="tst"
 
-os.environ["TILED_API_KEY"] = Secret.load(f"tiled-{LOCATION}-api-key").get()
-tiled_client = from_profile("nsls2")[LOCATION]["raw"]
-os.environ.pop("TILED_API_KEY")
-
 def get_tiled_client():
+    os.environ["TILED_API_KEY"] = Secret.load(f"tiled-{LOCATION}-api-key").get()
+    tiled_client = from_profile("nsls2")[LOCATION]["raw"]
+    os.environ.pop("TILED_API_KEY")
     return tiled_client